K-IsoTrace: Piping ISO Sketch

K-IsoTrace is a specialized piping isometric sketching app designed for on-site pipefitters, welders, and piping engineers.

Eliminate redrawing sketches on paper back at the office. Sketch directly in the field on your smartphone or tablet and immediately export high-quality PDFs to share with engineering and fabrication teams via email or messaging apps.

Who is K-IsoTrace for?

Pipefitters, welders, and plumbers needing quick on-site field routing sketches for retrofit or modification work.

Field engineers submitting clean AS-BUILT drawing feedback directly from mobile devices.

Fabricators needing exact piping spool dimensions and layout sharing.

Foremen and fitters explaining daily piping tasks clearly to apprentices and helpers.

Vocational trainees, trade school students, and certification candidates practicing isometric drawing.

Built by a 20-year piping and mechanical CAD design specialist, focusing purely on essential tools that work flawlessly in real-world jobsites.

Key Features

Dedicated Isometric Snap Grid: Automatic snapping at 30°, 90°, and 150° ensures crisp, accurate pipe axis lines even with shaky hands.

Fast Piping Drawing: 1-touch drag drawing, 2-point connections, and 45° offset (horizontal/vertical) guides. Fast radial menu for single-handed operation.

Auto Dimensions & Pipe Sizing: Tap two points to create automatic dimension lines with pipe diameters (e.g., 100A, 4"). Overlapping dimensions adjust automatically for clear readability.

Piping Symbol Library: Valves, strainers, eccentric/concentric reducers, flanges, caps, sockets, blinds, nozzles, sight glasses, pipe supports, and penetrations auto-align to the isometric pipe axis upon placement.

Automated AS-BUILT & Take-Off: Auto weld joint detection, joint numbering (Joint No.), material count, and auto paper boundary alignment.

Weld Tracking & Traceability Sheet: Record date, welder name, and joining method (Welding, Fusion, Bonding, Bolting) per joint on a generated summary sheet.

Stylus & Pen Notes: Freehand handwriting and markup support using S Pen or stylus.

Export & Sharing: A4/A3 PDF export, and shareable native drawing files (.iso.json) for collaborative editing.

Multi-Sheet Management: Handle multiple sheets within a single project file.

Work Modes: 'Basic Mode' for beginners/students and 'Advanced Mode' for comprehensive field drafting.

100% Offline Capability
Works completely without an internet connection in cleanrooms, basements, and remote industrial plants. Sketching, file saving, and PDF creation operate offline.

Free to Use
Core isometric sketching tools are completely free for all field workers and students.

What This App Is Not

Not a full PC 3D CAD or scale-heavy engineering modeler.

Does not support direct DWG/DXF conversion or 3D rendering.

Focused entirely on one goal: sketching clear, accurate piping layouts rapidly in the field.

Contact & Feedback
Email: kisotraceapp@gmail.com